I have been thinking about these myself, and have taken a look at the led lights that are sold in strips on Ebay.
You can cut to any length, and wire them in easily.
I was thinking of fitting a circle of them in each foglight surround as day time lights rather than foglamps.
It would look a bit smarter IMO.
As per the dealer and reading from different threads on the internet, to fit a fog lamp in the Magna, Era or Sportz variant, the bumper has to be changed, i.e Asta's bumper has to fitted. Apparently the lower variant bumpers do not support Hyundai original fog lamps. After market fog lamps could be fitted may be on the Magna.